tree: git://anongit.freedesktop.org/drm-intel drm-intel-next-queued head: 75c7b0b8620ce5a672da02e721a775acb7863c64 commit: 894ccebee2b0e606ba9638d20dd87b33568482d7 [3/23] drm/i915: Micro-optimise gen8_ppgtt_insert_entries() config: x86_64-randconfig-v0-02151136 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: git checkout 894ccebee2b0e606ba9638d20dd87b33568482d7 # save the attached .config to linux build tree make ARCH=x86_64

All warnings (new ones prefixed by >>):

drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen8_ppgtt_insert_4lvl':

...

drivers/gpu/drm/i915/i915_gem_gtt.c:964: warning: 'iter.sg' is used uninitialized in this function drivers/gpu/drm/i915/i915_gem_gtt.c:965: warning: 'iter.dma' is used uninitialized in this function

drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen8_ppgtt_insert_3lvl': drivers/gpu/drm/i915/i915_gem_gtt.c:947: warning: 'iter.sg' is used uninitialized in this function drivers/gpu/drm/i915/i915_gem_gtt.c:948: warning: 'iter.dma' is used uninitialized in this function

vim +964 drivers/gpu/drm/i915/i915_gem_gtt.c

958 enum i915_cache_level cache_level, 959 u32 unused) 960 { 961 struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); 962 struct sgt_dma iter = { 963 .sg = pages->sgl,

964 .dma = sg_dma_address(iter.sg), 965 .max = iter.dma + iter.sg->length,

966 }; 967 struct i915_page_directory_pointer **pdps = ppgtt->pml4.pdps; 968 unsigned int pml4e = gen8_pml4e_index(start);

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